UPM Institutional Repository

Effect of vegetation and waterbody on the garden city concept: an evaluation study using a newly developed city, Putrajaya, Malaysia


Citation

Morris, Kenobi Isima and Chan, Andy and Ooi, Maggie C. and Oozeer, Muhammad Y. and Abakr, Yousif A. and Morris, Kwami Justina Kenobi (2016) Effect of vegetation and waterbody on the garden city concept: an evaluation study using a newly developed city, Putrajaya, Malaysia. Computers, Environment and Urban Systems, 58. pp. 39-51. ISSN 0198-9715; ESSN: 1873-7587

Abstract

The garden city concept was adopted in the development of a new tropical city, Putrajaya, aimed at mitigating the effect of urban thermal modification associated with urbanisation, such as urban heat island (UHI). WRF/Noah/UCM coupled system was used to estimate the urban environment over the area and the individual thermal contributions of natural land use classes (vegetation and waterbody). A control experiment including all land use types describing the urban conditions of Putrajaya city agreed well with the observations in the region. A series of experiments was then conducted, in which vegetation and waterbody were successively replaced with an urban land use type, providing the basis for an assessment of their respective effect on urban thermal mitigation. Surface energy components, 2-m air temperature (T2m) and mixing ratio (Q2m), relative humidity (RH) and UHI intensity (UHII) showed variations for each land use class. Overall, an increase in urban surfaces caused a corresponding increase in the thermal conditions of the city. Conversely, waterbody and vegetation induced a daily reduction of 0.14 and 0.39 °C of T2m, respectively. RH, UHI and T2m also showed variations with urban fractions. A thermal reduction effect of vegetation is visible during mornings and nights, while that of water is minimally shown during daytime. However, during nights and mornings, canopy layer thermal conditions above waterbody remain relatively high, with a rather undesirable effect on the surrounding microclimate, because of its high heat capacity and thermal inertia.


Download File

[img]
Preview
PDF (Abstract)
Effect of vegetation and waterbody on the garden city concept an evaluation study using a newly developed city, Putrajaya, Malaysia.pdf

Download (6kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: https://doi.org/10.1016/j.compenvurbsys.2016.03.005
Publisher: Elsevier
Keywords: Garden city concept; WRF/Noah/UCM; Urban heat island; Putrajaya; Waterbody and vegetation; Tropical city
Depositing User: Nabilah Mustapa
Date Deposited: 07 Sep 2017 03:09
Last Modified: 07 Sep 2017 03:09
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.compenvurbsys.2016.03.005
URI: http://psasir.upm.edu.my/id/eprint/56981
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item